Construction of z-bar columns



(No Model.) 2 Sheets-Sheet 1.4

P. H. KINDL. GeNsTRUGTIoN nez-BAR COLUMNS. No.l 546,781. Patented Sept.Z4, 1895..

T i E i (No Model.) 2 Sheets-Shea?J 2.

I'. H. KINDL. GONSTRUGTION 0F Z-BAR COLUMNS.

. 546,781. vPatented Sept. 24, 1895.

u e @w fu C m C WITNESSES ANDREW RGRAHAM. PHOY0-UTNO-WASH|NGTOWQC NrrsnSTATES -ATnNT Fries.

FREDERICK H. KINDL, OF PITTSBURG, PENNSYLVANIA.

SPECIFICATION forming part of Letters Patent No. 546,781, datedSeptember 24, 1 895. Application filed July l5, 1895. Serial No.556,009. (No model.)

.To all whom it may concern.-

Be it known that I, FREDERICK H. KINDL, of Pittsburg, in the county ofAllegheny and State of Pennsylvania, have invented a new and usefulImprovement in the Construction of Z-Bar Columns, of which the followingis a full, clear, and exact description, reference being had to theaccompanying drawings, forming part of this specification, in which-Figure lis a horizontal sectional view of one of the sections of acolumn constructed in accordance with myinvention. Fig 2 is a sideelevation of a part of the section of column shown in Fig. l. Fig. 3 isa horizontal section of one of the upper sections of the column. Fig. 4is a side elevation of a part of the section of column shown in Fig. 3.Figs. 5, 6, and 7 show, respectively, different ways in which the Z-barsare assembled to form the column to give the desired strength to theseveral sections of the column and keep the dimensions A and B constant.

My invention consists in a compound column for buildings composed of aseries of sections, the sections for the the successive floors' or partsof the building in which the column is erected being composed of Z-barsof successively less size, the column itself having substantiallyuniform outline dimensions A and B from top to bottom.

The lower section of the column shown in Fig. l is composed of fourZ-bars b c d e, set in upright position, so that their webs 4 shall beparallel, the outside faces of the webs of the Z-bars b and e being inthe same plane, and the outside faces of the webs of the Z- bars c and dbeing also in the same plane, the anges 5 of the bars beingsecuredtogether by an intermediate plate or web or battenwork 6.

7 7 are cover-plates, which are riveted to the sides of the column. Thesections of column above the lower section are similarly constructed ofsuccessively smaller Z-bars,

and I assemble them as follows, so that the' dimensions represented bythe lines A B shall be constant from the top to the bottom of thecompound columns.

Fig. 3 shows in horizontal section a section of the column of an upperstory of the building. In this section four Z-bars b", c', d', and ehave the outer faces of their webs 4', respectively, in line, as abovedescribed; but the i'lnages 5 are not directly connected by abut tingagainst an intermediate plate 6. These flanges of the bars b and c havea separate side plate 8 and the flanges 5 of the bars e and d haveanother side plate 9, the side plates 8 and 9 being separated, so as tomake the dimensionAthe same as the length ofthe dimensionAin Fig. l. Theends of the flanges 5 of the bars d and e are also separated from theends ofthe corresponding flanges d and c sufficiently to make thedimension B equal to the corresponding dimension of Fig. l. There arealso tie plates or bars l0 11, connecting, respectively, the bars b ande and the bars c and cl, so as to make the two sections of the Ycolumnact as one.

In Figs. 5, 6, and 7 Ishow other methods of constructing Z-bar columnsas will make the dimensions A and B constant, the dimensions C and Dbeing the variables.

The principal advantages of a column so constructed are as follows:

First. Having practically equal radii of gyrations in all directions, itwill have practically a maximum strength in all directions.

Second. The floor beams and girders which abut against or fit betweensuch columns in successive stories and supported on brackets attached totheir sides or on cap-plates will have the same length throughout thesuccessive floors, and can be ordered directly from the mill without theprevious calculations necessary when the dimensions A and B of thecolumns on the successive floors of the building are not the same.

Third. The beams which abut against or are connected to the columns canhave the same spacing for their rivets, bolts, or open holes. These aremade according to the same measurement throughout, and therefore onedetail drawing for the beams or girders on any one floor will sufficefor all of them, and

it is unnecessary to make separate drawings for the beams and girdersfor the several doors, as required when the dimensions A and B of thecolumn are different on the several floors. Labor and chances of errorare thus reduced in making the drawings.

Fourth. The plates, fillers, angle-bars, batten-plates, and otherconnections required in the construction of the column, as well as ICOthe brackets required to support the beams or girders which abut againstor are extended between the columns, can be made substantially alike inrespect of their punching, riveting, tbc., in the successive floors ofthe building, and thus the Working up of the details and the cost of thedrawings, as well as the chances of error, are largely reduced. Thecolumns can be made of less cost because of the uniformity of suchconnections, and these connections can be kept in stock in largequantities ready for use to be supplied as required.

Fifth. As the floor beams or girders which abut or extend between thecolumns will have the same workmanship and will be substantially alike,the erection of buildings having such columns will be greatlyfacilitated in respect ot saving of time and cost.

I claim- 1. A compound column, the successive sections of which arecomposed respectively of four Z-bars the bars of the several sectionsbeing of unequal dimensions but being riveted together in such a waythat the dimensions A and B are constant; substantially as described.

2. A compound column,the successive sections of which are composedrespectively of four Z-bars riveted together, so that the dimensions Cbetween the opposing flanges of the Z-bars shall vary, and that theoutline dimensions A and B of the column shall be constant throughout;substantially as described.

3. A compound eolumn,the several sections ot which are composedrespectively of four Z-bars tied together, the bars of the severalsections being of unequal dimensions, but being tied together so thatthe dimensions C between the opposin g flanges ot the Z-bars shall vary,and so that the outline dimensions A and B of the column shall beconstant throughout; substantially as described.

4. A compound column, the several sections of which are composedrespectively of four Z-bars tied together, the bars of the severalsections being of unequal dimensions,but bcing tied together so that thedimensions D bctween the ends of the opposingilangesof the beams shallvary, and so that the outline dimensions A and Bof the column shall becon stantthroughout; substantially as described.

In testimony whereof, I have hereunto set my hand.

F. ll. KINDL.

Witnesses:

1I. M. CoRwIN, WARREN W. SWARTZ.

